Dustin blushes slightly while looking away.
" P-put that shitty thing away. Jesus man."
Ty frowned from the comment but did so anyways as he replied.
" Don't worry you'll have time to enjoy it later." He walks over to Dustin to pat him on the shoulder, walking over to the door to unlock it. "Shall we go show June and Mark my new look?~" He said with a smile.
Dustin huffed and shrugged off the hand, replying harshly " Just hurry up and get out of my room."
Ty shrugged then left his room, soon leaving Dustin to hear a screech coming from downstairs.
"Probably from mom" he thinks.
One thing he couldn't deny was how intimidating Ty's ass looked when he walked out the door. God he needed to jerk off but he also wanted to see what his mom and dad would say about Ty.
Dustin quickly changes into some clothes then runs downstairs.
June was sitting on the couch with her hand on her forehead, trying to comprehend what she's seeing right before her. Mark was less shocked but more curious about what the hell is happening to his two boys. Ty smiles, reassuring them that it's just himself hitting a sudden growth spurt. It's pretty hard for the two parents to believe his reassurance but they just went with it. The parents said a 'Good Morning' to their son Dustin as he came down then went back to what they were doing. Dustin was pretty confused on what he just witnessed between his step brother and parents but then he felt a tug from Ty.
" Lets go to my room" Ty says while fixing his glasses. He quickly drags Dustin to his room to lock the door behind him and sigh in relief.
Dustin felt like he was captive by some kind of masked psycho, but instead it was his now handsome brother who seems to want to fuck him. He stands near his desk , seeing his used/stretched out onahole which he won't question about now.
Ty takes off his glasses and lays it on the side of his desk, moving closer to Dustin to lock him in his arms, preventing Dustin from escaping. " So ... you know my birthday is today" He says, smiling while rubbing his bulge onto Dustin's leg. Dustin shudders from the feeling of Ty's dick touching his leg, feeling himself get hard. He had nowhere to run and the only person he could look to is him, is one and only step brother who wants to fuck him. Ty smirks and even though Ty was shorter than he was, he looks to be the more dominant man right now.
“Lets start this slowly shall we?” Ty says while running a hand underneath Dustin shirt, implying that he should take it off. Dustin huffs in annoyance but does so anyways. Ty does the same, showing his puffy nipples even more swollen from being horny. Dustin stares at them deeply, feeling more heat rush up to his head and groin. “What the fuck are those?” He asks
Ty just leans his chest against Dustin's somewhat muscular chest.
“You like? “ Ty asks teasingly while rubbing his swollen nipples onto him, feeling both of their bodies twitch in excitement.
“they .. look stiff” he replies
“So do you~” Ty replies while suddenly grabbing onto his dick. Dustin jumps from the sudden squeeze, motioning his hands to grab onto Ty’s ass. Ty squeaks in response but grins as he pops up an idea. “ i’ll make you feel even better.”
Dustin wasn’t sure what he meant by that until his whole body started to tingle. He felt his muscles tensing up, feeling his skin tighten, forming small veins around his arms and legs. “w-what did you do?!” he exclaims while feeling the tension grow stronger, seeing him grow a few inches taller.
“Something you’ll like .. muscles~” Ty replies while teasingly biting on Dustin's now stiff nipples.
Dustin stopped growing but seeing that he grew taller along with stiff muscles, he couldn’t help but feel his lust grow. He already saw Ty as a cute lil brother when he teased him before but now.. he saw him as a beautiful guy who he now wants to fuck and ravage his body. Dustin suddenly felt the urge to cum from how tight his boxers were as they strained his penis. And so he came right between their stomachs.
“ oh god .. this feels amazing” Dustin states as he flexes his new muscles.
“ You look great~” Ty says while kissing parts of Dustin’s biceps, feeling his own cock swell.
Dustin couldn’t take it anymore, he squeezed Ty’s ass hard, feeling how soft and perfect they fit into his hands. Ty let out a soft sigh, taking out his 8 inch as well as Dustin's 6 inch. The two cocks rub together, feeling their precum lubricate their cocks as they rub together. Dustin leans down to shove his tongue into Ty’s mouth, letting their tongues in twine together.
Ty pulls back, heaving for air while saying “ o-one more thing.”
Dustin anticipated the worst but instead felt something great, his cock burned as well as his balls. It felt amazing to feel Ty’s cock rub against his as his length grew longer and thicker. His balls , at the same time, feel tighter with cum filling and producing more, they were growing to be the size of 2 tennis balls. Dustin grunts in pleasure, lifting Ty so he can ride on his shaft, putting his cock between his thighs. “ T-ty.. “
Ty moans, feeling his butt being pushed against his step brother's growing cock, he starts kissing Dustin's body.
The growing stops, leaving Dustin with a 12 inch cock and it looked as if it was ready to explode. “fuck Ty .. i need you now” he says while rubbing his thumbs on Ty’s puffy nipples. Ty shuddered from his words but licked his neck, trailing up to his ear to whisper “ fuck me hard Dustin..” and with that Dustin throws Ty onto the bed to position himself on top. Positioning him, he lubes up Ty’s asshole with the immense amount of precum that flowed out of his dick, making it slick and fuckable.
“You ready lil bro?”
Ty just responds “Just fuck me already!!”
Dustin grunts as he pushes in 6 inches of himself inside of him, leaving Ty stunned and twitching, as he adjusts himself to take in the size.
“God Ty you’re tight as fuck.. it feels amazing” Dustin exclaims while slowly starting to move, making each in reach further into Ty.
“My ass hurts but .. this feels so good!!” Ty says while arching his back, using one of his free hands to jerk off.
They fucked for a good 1 to 2 hours, making a mess in Ty’s somewhat small room. They laid on the small bed but they both fit.
“I’ll help you clean this up later..” Dustin says, rubbing Ty’s shoulder as he lays next to him.
“u-uh thanks..” Ty wasn’t sure how to respond since this was his first time seeing Dustin actually offer him something other than the small TV he gave him.
Dustin ruffles Ty’s soft blonde hair then asks “Alright birthday boy~ What do you wanna do next?”
(This is pretty long but ay it was fun writting it)